Home / Standards / GB/T 7131-2026 GB/T 7131-2026 Upcoming Plastics—Identification of polymers—Pyrolytic gas chromatography method 塑料 聚合物鉴定 裂解气相色谱法 Standard Type GBT ICS 83.080.01 CCS G31 Status 即将实施 Issue Date 2026-03-31 Implementation 2026-10-01 Responsible Dept 中国石油和化学工业联合会 Drafting Unit N/A